thank you very much. when i run your command, my machine froze but after reset, the virtual volumes undet the raid1 are now showing as regular volumes and i was able to lvremove them and original volume keeps on working. thanks a lot Shi <div class="gmail_quote">On 2013-10-24 5:23 AM, "Marian Csontos" <<a href="mailto:mcsontos@redhat.com">mcsontos@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On 10/23/2013 06:50 PM, Shi Jin wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi there, I have setup a LVM2 raid1 mirror with lvconvert -m 1 --type raid1 /dev/vg_data/lv_test /dev/sdd and then after I remove one of its legs, the remaining leg keeps on working just fine. However, I then want to convert this to a simple Linux volume. it would fail: [root@shi-rhel63 ~]# lvconvert -m 0 /dev/vg_data/lv_test Couldn't find device with uuid QpjTRd-Cc0o-RC0y-7Gz8-GQ4u-25FM-0vO4xt. Cannot change VG vg_data while PVs are missing. Consider vgreduce --removemissing. </blockquote> Following worked for me except I ended up with unclean FS: lvconvert -m 0 --repair -f vg_data/lv_test -- Marian <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> removemissing not working either [root@shi-rhel63 ~]# vgreduce --removemissing vg_data Couldn't find device with uuid QpjTRd-Cc0o-RC0y-7Gz8-GQ4u-25FM-0vO4xt. WARNING: Partial LV lv_test needs to be repaired or removed. WARNING: Partial LV lv_test_rmeta_1 needs to be repaired or removed. WARNING: Partial LV lv_test_rimage_1 needs to be repaired or removed. There are still partial LVs in VG vg_data. To remove them unconditionally use: vgreduce --removemissing --force. Proceeding to remove empty missing PVs. What should I do in my case to convert the LV to linear? My OS information: [root@shi-rhel63 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.3 (Santiago) [root@shi-rhel63 ~]# uname -a Linux shi-rhel63 2.6.32-279.el6.x86_64 #1 SMP Wed Jun 13 18:24:36 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux [root@shi-rhel63 ~]# lvm version LVM version: 2.02.95(2)-RHEL6 (2012-05-16) Library version: 1.02.74-RHEL6 (2012-05-16) Driver version: 4.22.6 Thanks a lot. Shi _______________________________________________ linux-lvm mailing list <a href="mailto:linux-lvm@redhat.com" target="_blank">linux-lvm@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/linux-lvm" target="_blank">https://www.redhat.com/mailman/listinfo/linux-lvm</a> read the LVM HOW-TO at <a href="http://tldp.org/HOWTO/LVM-HOWTO/" target="_blank">http://tldp.org/HOWTO/LVM-HOWTO/</a> </blockquote> _______________________________________________ linux-lvm mailing list <a href="mailto:linux-lvm@redhat.com" target="_blank">linux-lvm@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/linux-lvm" target="_blank">https://www.redhat.com/mailman/listinfo/linux-lvm</a> read the LVM HOW-TO at <a href="http://tldp.org/HOWTO/LVM-HOWTO/" target="_blank">http://tldp.org/HOWTO/LVM-HOWTO/</a> </blockquote></div>